AU2003237833A1 - Delta-sigma modulators with integral digital low - pass filtering - Google Patents

Delta-sigma modulators with integral digital low - pass filtering

Info

Publication number
AU2003237833A1
AU2003237833A1 AU2003237833A AU2003237833A AU2003237833A1 AU 2003237833 A1 AU2003237833 A1 AU 2003237833A1 AU 2003237833 A AU2003237833 A AU 2003237833A AU 2003237833 A AU2003237833 A AU 2003237833A AU 2003237833 A1 AU2003237833 A1 AU 2003237833A1
Authority
AU
Australia
Prior art keywords
delta
pass filtering
digital low
sigma modulators
integral digital
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
AU2003237833A
Other languages
English (en)
Inventor
John Laurence Melanson
Heling Yi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Cirrus Logic Inc
Original Assignee
Cirrus Logic Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Cirrus Logic Inc filed Critical Cirrus Logic Inc
Publication of AU2003237833A1 publication Critical patent/AU2003237833A1/en
Abandoned legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M7/00—Conversion of a code where information is represented by a given sequence or number of digits to a code where the same, similar or subset of information is represented by a different sequence or number of digits
    • H03M7/30—Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction
    • H03M7/3002—Conversion to or from differential modulation
    • H03M7/3004—Digital delta-sigma modulation
    • H03M7/3015—Structural details of digital delta-sigma modulators
    • H03M7/3031—Structural details of digital delta-sigma modulators characterised by the order of the loop filter, e.g. having a first order loop filter in the feedforward path
    • H03M7/3033—Structural details of digital delta-sigma modulators characterised by the order of the loop filter, e.g. having a first order loop filter in the feedforward path the modulator having a higher order loop filter in the feedforward path, e.g. with distributed feedforward inputs
    • H03M7/304—Structural details of digital delta-sigma modulators characterised by the order of the loop filter, e.g. having a first order loop filter in the feedforward path the modulator having a higher order loop filter in the feedforward path, e.g. with distributed feedforward inputs with distributed feedback, i.e. with feedback paths from the quantiser output to more than one filter stage
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M7/00—Conversion of a code where information is represented by a given sequence or number of digits to a code where the same, similar or subset of information is represented by a different sequence or number of digits
    • H03M7/30—Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction
    • H03M7/3002—Conversion to or from differential modulation
    • H03M7/3004—Digital delta-sigma modulation
    • H03M7/3015—Structural details of digital delta-sigma modulators
    • H03M7/302—Structural details of digital delta-sigma modulators characterised by the number of quantisers and their type and resolution
    • H03M7/3024—Structural details of digital delta-sigma modulators characterised by the number of quantisers and their type and resolution having one quantiser only
    • H03M7/3026—Structural details of digital delta-sigma modulators characterised by the number of quantisers and their type and resolution having one quantiser only the quantiser being a multiple bit one
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M7/00—Conversion of a code where information is represented by a given sequence or number of digits to a code where the same, similar or subset of information is represented by a different sequence or number of digits
    • H03M7/30—Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction
    • H03M7/3002—Conversion to or from differential modulation
    • H03M7/3004—Digital delta-sigma modulation
    • H03M7/3015—Structural details of digital delta-sigma modulators
    • H03M7/302—Structural details of digital delta-sigma modulators characterised by the number of quantisers and their type and resolution
    • H03M7/3024—Structural details of digital delta-sigma modulators characterised by the number of quantisers and their type and resolution having one quantiser only
    • H03M7/3028—Structural details of digital delta-sigma modulators characterised by the number of quantisers and their type and resolution having one quantiser only the quantiser being a single bit one

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
AU2003237833A 2002-05-20 2003-05-14 Delta-sigma modulators with integral digital low - pass filtering Abandoned AU2003237833A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US10/151,322 US7116721B1 (en) 2002-05-20 2002-05-20 Delta-sigma modulators with integral digital low-pass filtering
US10/151,322 2002-05-20
PCT/US2003/014986 WO2003100983A1 (fr) 2002-05-20 2003-05-14 Modulateurs delta-sigma a filtrage passe-bas numerique integral

Publications (1)

Publication Number Publication Date
AU2003237833A1 true AU2003237833A1 (en) 2003-12-12

Family

ID=29582040

Family Applications (1)

Application Number Title Priority Date Filing Date
AU2003237833A Abandoned AU2003237833A1 (en) 2002-05-20 2003-05-14 Delta-sigma modulators with integral digital low - pass filtering

Country Status (4)

Country Link
US (3) US7116721B1 (fr)
EP (1) EP1506618A4 (fr)
AU (1) AU2003237833A1 (fr)
WO (1) WO2003100983A1 (fr)

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FR2866166B1 (fr) * 2004-02-06 2006-06-16 Anagram Technologies Sa Modulateur en treillis vectoriel
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US20050266805A1 (en) * 2004-05-28 2005-12-01 Jensen Henrik T Digital delta sigma modulator and applications thereof
US7456766B2 (en) * 2006-07-19 2008-11-25 Qualcomm Incorporated Sigma-delta modulation with offset
US7825844B2 (en) * 2008-02-06 2010-11-02 Qualcomm Incorporated Adaptive high-order digital-to-analog conversion
JP5239387B2 (ja) * 2008-02-21 2013-07-17 株式会社Ｊｖｃケンウッド データ変換装置、プログラム、及び方法
US8326075B2 (en) * 2008-09-11 2012-12-04 Google Inc. System and method for video encoding using adaptive loop filter
US8436757B2 (en) * 2009-03-04 2013-05-07 National University Corporation Gunma University Complex bandpass ΔΣAD modulator and digital radio receiver
JP2012522459A (ja) * 2009-03-31 2012-09-20 アギア システムズ インコーポレーテッド デルタシグマ変調器を用いてｒｆ信号を直接合成するための方法および装置
US7978113B2 (en) * 2009-09-10 2011-07-12 National Semiconductor Corporation Analog-to-digital converter having output data with reduced bit-width and related system and method
US8264392B1 (en) 2009-12-09 2012-09-11 Marvell International Ltd. Compact high-speed analog-to-digital converter for both I and Q analog to digital conversion
JP2012049777A (ja) * 2010-08-26 2012-03-08 Rohm Co Ltd 音声出力装置
US8780971B1 (en) 2011-04-07 2014-07-15 Google, Inc. System and method of encoding using selectable loop filters
US8780996B2 (en) 2011-04-07 2014-07-15 Google, Inc. System and method for encoding and decoding video data
US8781004B1 (en) 2011-04-07 2014-07-15 Google Inc. System and method for encoding video using variable loop filter
US8885706B2 (en) 2011-09-16 2014-11-11 Google Inc. Apparatus and methodology for a video codec system with noise reduction capability
US9131073B1 (en) 2012-03-02 2015-09-08 Google Inc. Motion estimation aided noise reduction
US9344729B1 (en) 2012-07-11 2016-05-17 Google Inc. Selective prediction signal filtering
EP2712077A1 (fr) * 2012-09-20 2014-03-26 Alcatel-Lucent Modulation
EP2984759A2 (fr) 2013-04-09 2016-02-17 Cirrus Logic, Inc. Systèmes et procédés pour générer un signal de sortie numérique dans un système de microphone numérique
US9626981B2 (en) 2014-06-25 2017-04-18 Cirrus Logic, Inc. Systems and methods for compressing a digital signal
US10102613B2 (en) 2014-09-25 2018-10-16 Google Llc Frequency-domain denoising
US9936282B2 (en) 2016-04-14 2018-04-03 Cirrus Logic, Inc. Over-sampling digital processing path that emulates Nyquist rate (non-oversampling) audio conversion
EP3471271A1 (fr) * 2017-10-16 2019-04-17 Acoustical Beauty Convolutions améliorées de signaux numériques utilisant une optimisation des exigences de bits d'un signal numérique cible
US10181862B1 (en) * 2018-01-24 2019-01-15 Raytheon Company Parameterizable bandpass delta-sigma modulator
US10797659B2 (en) * 2018-10-15 2020-10-06 Semiconductor Components Industried, Llc Audio amplifier having multiple sigma-delta modulators to drive an output load

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US5392042A (en) * 1993-08-05 1995-02-21 Martin Marietta Corporation Sigma-delta analog-to-digital converter with filtration having controlled pole-zero locations, and apparatus therefor
US5471209A (en) * 1994-03-03 1995-11-28 Echelon Corporation Sigma-delta converter having a digital logic gate core
US5598158A (en) * 1994-11-02 1997-01-28 Advanced Micro Devices, Inc. Digital noise shaper circuit
US5579004A (en) * 1994-11-02 1996-11-26 Advanced Micro Devices, Inc. Digital interpolation circuit for a digital-to-analog converter circuit
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US5838270A (en) * 1995-01-12 1998-11-17 Texas Instruments Incorporated Second order and cascaded 2-1 oversampled modulators with improved dynamic range
US5760722A (en) * 1995-01-31 1998-06-02 The United States Of America As Represented By The Secretary Of The Navy Distributed quantization noise transmission zeros in cascaded sigma-delta modulators
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Also Published As

Publication number Publication date
EP1506618A1 (fr) 2005-02-16
WO2003100983A1 (fr) 2003-12-04
US7110460B1 (en) 2006-09-19
EP1506618A4 (fr) 2005-08-17
US7194036B1 (en) 2007-03-20
US7116721B1 (en) 2006-10-03

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Legal Events

Date Code Title Description
MK6 Application lapsed section 142(2)(f)/reg. 8.3(3) - pct applic. not entering national phase